Question

Why do small bubbles have excess of pressure

Answer 1

According to the Boyle's law: At constant temperature , the pressure of a fixed amount of gas is inversely proportional to its volume"
P α 1/V
so, volume of the bubble is small, hence the pressure inside the bubble will be more.

Thus,small bubbles have excess of pressure

Answer 2

In Boyle's law For a fixed amount of gas, the pleasure and the volume of a gas are inversely proportional when the temperature is constant.

So, P is proportional to 1/v [ p is the pressure and v is the volume]

Now,small bubbles have small volume and much pressure.

So the small bubbles have excess of pressure.

Hope it helps.